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Yi-Coder 9B

01.AI's Apache-2.0 bilingual code model — strong 9B coding with 128K context.

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About

Yi-Coder-9B-Chat (September 2024) is 01.AI's bilingual Chinese/English code model: 9B parameters, 128K context, trained on 10T tokens with strong code generation and reasoning.

Apache 2.0 licensed — commercial use allowed. 9.8k Hugging Face downloads. At release it was competitive with much larger code models on HumanEval/MBPP-style evaluations (provider-reported). A 2024 model now superseded by Qwen2.5-Coder-7B in the same size class, but the Apache-2.0 terms and bilingual strength keep it viable for Chinese-English codebases.

Specs

Context window

128,000 tokens

Pricing

Free — open weights (Apache 2.0), self-hosted, commercial use allowed.

Free quota

Free — download and run the weights yourself (Apache 2.0).

API access

Self-hosted (Transformers, vLLM; Hugging Face checkpoints).

Weights

Open weights

Released

September 5, 2024

Benchmarks

Provider-claimed at release (2024): competitive HumanEval/MBPP for 9B — treat as provider-claimed and dated. No current leaderboard presence.

Provider-reported unless a source says otherwise. Benchmarks are marketing-adjacent by nature — treat them as directional.

Use cases

codecodingmultilingualdebugging

Trust score — 6/10

/10 trustMetrics-checked

Scored 6/10 (metrics tier). Apache 2.0, bilingual, 128K context — a well-rounded 2024 code model. Docked four points: (1) superseded by Qwen2.5-Coder-7B in the same class; (2) benchmark claims are dated provider reports; (3) modest adoption (9.8k HF downloads); (4) 01.AI's model lineup has moved on. Solid for bilingual codebases; not a current leader.

How the trust score is built

Full methodology →
Adoption · stars/downloads, log-scaled vs peers
6.2/10
Maintenance · recency, releases, issue load
4.0/10
Openness · license + docs
8.8/10
Manual review · sanity read + red-flag check
6.0/10
  • · HF downloads 9,838 (peer-normalized)
  • · released 768 days ago
  • · manual review: bilingual, 128K context; superseded by Qwen2.5-Coder-7B; dated provider benchmarks; license: Apache-2.0

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